Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
  • B22D41/50—Pouring-nozzles

Definitions

• the invention relates to an immersion nozzle for casting metal, in particular steel, in continuous casting plants for thin slabs, with a pouring part having a circular cross section, fastened to a pouring vessel, and a pouring part immersed in the melt located in a rectangular mold, the mouth of which is designed in a rectangular cross section .
• EP 0 630 712 discloses an immersion spout, in particular for thin slab casting, which is divided into two sections and whose lower molded block has a length which is substantially greater than its width.
• the individual sections are formed by separate shaped blocks, the shaped blocks engaging in one another at their mutually facing ends and a seal being arranged between the interlocking ends of the shaped blocks.
• the individual shaped blocks show a complicated structure with clear differences in the wall thickness.
• Length section is rectangular in cross section.
• the dimensions in the mouth area are in a length / width ratio of 20: 1 to 80: 1.
• the outlet of the immersion pouring tube is formed by two orifices, which together have a flow cross-section that is not quite as large as the flow cross-section at the stopper closure.
• a ratio of less than 1: 1 between the flow cross-section in the inlet pipe and at the outlet of the immersion pouring pipe is achieved by redirecting the flow and narrowing two orifices.
• the aim of the invention is to provide an immersion pouring tube which is easy to manufacture, has a long service life, has a low-thermal stress structure in terms of its manufacture and in operation, and which enables the liquid metal to flow out uniformly.
• the invention achieves this goal by the features specified in the characterizing part of claim 1.
• the immersion pouring tube is constructed from two basic components, namely a tubular pouring part and a straight pouring part. Between these two basic components, which are completely different in shape, there is a short transition in terms of their overall length.
• the flow of the molten steel can be carried out completely calmly, provided that the flat wall elements are arranged almost parallel to each other.
• the simple molded elements either round or straight, allow the individual components of the immersion pouring tube to be adapted to the high thermal stresses to be expected.
• the use of wall elements of the same wall thickness counts. Since the transition between the pouring and the pouring part plays a subordinate role with regard to the flow conditions, this constructive freedom can be used for optimization with regard to a low stress of the transition part.
• Impact elements which are arranged at the foot of the pouring part, can have a positive influence on the flow conditions, particularly in the transition region.
• Thin slab molds with parallel side walls and a width of up to 60 mm can be used.
• melt quantity is adjusted using an adjusting element in the pouring vessel, regularly using a stopper. 405
• Figure 1 is a schematic diagram of the immersion pouring tube and the pouring vessel
• FIG. 2 shows an immersion pouring tube with the head-side expansion of the immersion casting.
• FIG. 3 immersion pouring tube with a roof-shaped pouring portion
• FIG. 1 shows a section of a pouring vessel 41 with the outlet opening 43, which can be blocked or constricted by a stopper 42.
• a pouring part 11 is fastened, which has the shape of a tube and has flat end faces on the mouth side.
• the tubular pouring part 11 is connected to a substantially rectangular pouring part 21.
• the pouring part 21 dips into the melt S on the mouth side, which is located in a mold 51.
• the pouring part 21 has broad sides 22, shown in the left part of the drawing, and
• a heating device 31 is shown as a sketch, which is guided essentially parallel to the broad sides 22.
• the broad sides 22 and the narrow sides 23 are guided essentially in parallel.
• an embodiment of the pouring part is shown, in which the narrow sides 23 spread at an angle of ⁇ 7 ° C. in the direction of flow.
• FIG. 2 shows a pouring part in perspective, the broad sides of which open conically up to an inner width K against the direction of flow.
• a square with the edge length K is sufficient in the middle, on which the end face 12 of the tubular pouring part 11 can be placed or can even be inserted through an opening of a suitable size.
• the end wall 27 can be designed to converge conically to the edge of the broad sides 26
• the length of the transition part I is shown in the figure, and this is related to the spacing of the broad sides a as l / A ⁇ 1/4
• the total length of the immersion pouring tube consisting of the pouring part 11 and the pouring part 21 is marked with L.
• FIG. 3 shows a sketch of an immersion pouring tube, in which the pouring part is configured at the top in the form of a roof, which is fitted at the head end in slots 14 of the pouring part 11 with its corresponding region 24.
• the head 25 of the pouring part 2 has an end wall 27 that opens from the pouring part in the direction of the roof to the edge of the broad sides
• the slot 14 of the pouring part 11 or the part 24 of the pouring part 21 corresponding to the slot 14 has a length of I.
• Figure -1 shows in detail the mouth area 13 of the E ⁇ ng ⁇ eßte ⁇ ls11 Here is in
• Top view of the slot 14 can be seen in the pouring part, into which the corresponding part 24 is fitted.
• a tongue 29 is provided, which is fitted into a groove 19 of the pouring part 11.
• the arrangement of the tongue and groove allows the parts 1 to be pushed together horizontally 1 and 21 are possible, but in operation the pouring part 21 is prevented from falling out of the slot 14 of the pouring part 11
• FIG. 5 shows an immersion pouring tube with a pouring part 21 which is attached to the pouring vessel 41 completely independently of the pouring part 11.
• the pouring part 11 which is arranged immediately below the outlet opening 43 of the pouring vessel 41, is one in the pouring space Gg of the pouring part
• the insert 28 surrounded.
• the insert 28 has a shape which, in a suitable manner, guides the melt stream leaving the tubular casting 11 with little swirling.
• This configuration makes it possible in the shortest possible way to force the molten metal having a round cross-sectional area after leaving the outlet opening 43 in the shortest possible manner into a metal stream which has a rectangular cross-sectional area and has a large narrow / wide side ratio.
• a * free cross-sectional area pouring part a distance broadsides b Narrow side distance

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Continuous Casting (AREA)
• Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
• Molds, Cores, And Manufacturing Methods Thereof (AREA)
• Manufacture Of Alloys Or Alloy Compounds (AREA)
• ing And Chemical Polishing (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Glass Compositions (AREA)
• Laminated Bodies (AREA)
• Treatment Of Steel In Its Molten State (AREA)

Priority Applications (9)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7758505

Family Applications (1)

Country Status (12)

Cited By (1)

Families Citing this family (5)

Citations (4)

Family Cites Families (3)

• 1995
  • 1995-03-21 DE DE19512208A patent/DE19512208C1/de not_active Expired - Fee Related
• 1996
  • 1996-03-04 AT AT96904747T patent/ATE200870T1/de active
  • 1996-03-04 RU RU97117458A patent/RU2145535C1/ru active
  • 1996-03-04 JP JP8527966A patent/JP3016596B2/ja not_active Expired - Lifetime
  • 1996-03-04 KR KR1019970706171A patent/KR100295953B1/ko not_active IP Right Cessation
  • 1996-03-04 DE DE59606850T patent/DE59606850D1/de not_active Expired - Lifetime
  • 1996-03-04 EP EP96904747A patent/EP0814929B1/de not_active Expired - Lifetime
  • 1996-03-04 DE DE19680152T patent/DE19680152D2/de not_active Expired - Fee Related
  • 1996-03-04 CN CN96192608A patent/CN1072079C/zh not_active Expired - Fee Related
  • 1996-03-04 US US08/930,026 patent/US5916472A/en not_active Expired - Fee Related
  • 1996-03-04 AU AU48749/96A patent/AU4874996A/en not_active Abandoned
  • 1996-03-04 WO PCT/DE1996/000405 patent/WO1996029166A1/de active IP Right Grant
  • 1996-03-20 ZA ZA962272A patent/ZA962272B/xx unknown
  • 1996-04-13 TW TW085104498A patent/TW318803B/zh active

Patent Citations (4)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events